1 /*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <android/bitmap.h>
18 #include "JNIHelpers.h"
19 #include "utils/log.h"
20 #include "FrameSequence.h"
21
22 #include "FrameSequenceJNI.h"
23
24 #define JNI_PACKAGE "android/support/rastermill"
25
26 static struct {
27 jclass clazz;
28 jmethodID ctor;
29 } gFrameSequenceClassInfo;
30
31 ////////////////////////////////////////////////////////////////////////////////
32 // Frame sequence
33 ////////////////////////////////////////////////////////////////////////////////
34
createJavaFrameSequence(JNIEnv * env,FrameSequence * frameSequence)35 static jobject createJavaFrameSequence(JNIEnv* env, FrameSequence* frameSequence) {
36 if (!frameSequence) {
37 return NULL;
38 }
39 return env->NewObject(gFrameSequenceClassInfo.clazz, gFrameSequenceClassInfo.ctor,
40 reinterpret_cast<jlong>(frameSequence),
41 frameSequence->getWidth(),
42 frameSequence->getHeight(),
43 frameSequence->isOpaque(),
44 frameSequence->getFrameCount(),
45 frameSequence->getDefaultLoopCount());
46 }
47
nativeDecodeByteArray(JNIEnv * env,jobject clazz,jbyteArray byteArray,jint offset,jint length)48 static jobject nativeDecodeByteArray(JNIEnv* env, jobject clazz,
49 jbyteArray byteArray, jint offset, jint length) {
50 jbyte* bytes = reinterpret_cast<jbyte*>(env->GetPrimitiveArrayCritical(byteArray, NULL));
51 if (bytes == NULL) {
52 jniThrowException(env, ILLEGAL_STATE_EXEPTION,
53 "couldn't read array bytes");
54 return NULL;
55 }
56 MemoryStream stream(bytes + offset, length);
57 FrameSequence* frameSequence = FrameSequence::create(&stream);
58 env->ReleasePrimitiveArrayCritical(byteArray, bytes, 0);
59 return createJavaFrameSequence(env, frameSequence);
60 }
61
nativeDecodeStream(JNIEnv * env,jobject clazz,jobject istream,jbyteArray byteArray)62 static jobject nativeDecodeStream(JNIEnv* env, jobject clazz,
63 jobject istream, jbyteArray byteArray) {
64 JavaInputStream stream(env, istream, byteArray);
65 FrameSequence* frameSequence = FrameSequence::create(&stream);
66 return createJavaFrameSequence(env, frameSequence);
67 }
68
nativeDestroyFrameSequence(JNIEnv * env,jobject clazz,jlong frameSequenceLong)69 static void nativeDestroyFrameSequence(JNIEnv* env, jobject clazz,
70 jlong frameSequenceLong) {
71 FrameSequence* frameSequence = reinterpret_cast<FrameSequence*>(frameSequenceLong);
72 delete frameSequence;
73 }
74
nativeCreateState(JNIEnv * env,jobject clazz,jlong frameSequenceLong)75 static jlong nativeCreateState(JNIEnv* env, jobject clazz, jlong frameSequenceLong) {
76 FrameSequence* frameSequence = reinterpret_cast<FrameSequence*>(frameSequenceLong);
77 FrameSequenceState* state = frameSequence->createState();
78 return reinterpret_cast<jlong>(state);
79 }
80
81 ////////////////////////////////////////////////////////////////////////////////
82 // Frame sequence state
83 ////////////////////////////////////////////////////////////////////////////////
84
nativeDestroyState(JNIEnv * env,jobject clazz,jlong frameSequenceStateLong)85 static void nativeDestroyState(
86 JNIEnv* env, jobject clazz, jlong frameSequenceStateLong) {
87 FrameSequenceState* frameSequenceState =
88 reinterpret_cast<FrameSequenceState*>(frameSequenceStateLong);
89 delete frameSequenceState;
90 }
91
nativeGetFrame(JNIEnv * env,jobject clazz,jlong frameSequenceStateLong,jint frameNr,jobject bitmap,jint previousFrameNr)92 static jlong JNICALL nativeGetFrame(
93 JNIEnv* env, jobject clazz, jlong frameSequenceStateLong, jint frameNr,
94 jobject bitmap, jint previousFrameNr) {
95 FrameSequenceState* frameSequenceState =
96 reinterpret_cast<FrameSequenceState*>(frameSequenceStateLong);
97 int ret;
98 AndroidBitmapInfo info;
99 void* pixels;
100 if ((ret = AndroidBitmap_getInfo(env, bitmap, &info)) < 0) {
101
102 jniThrowException(env, ILLEGAL_STATE_EXEPTION,
103 "Couldn't get info from Bitmap ");
104 return 0;
105 }
106
107 if ((ret = AndroidBitmap_lockPixels(env, bitmap, &pixels)) < 0) {
108 jniThrowException(env, ILLEGAL_STATE_EXEPTION,
109 "Bitmap pixels couldn't be locked");
110 return 0;
111 }
112
113 int pixelStride = info.stride >> 2;
114 jlong delayMs = frameSequenceState->drawFrame(frameNr,
115 (Color8888*) pixels, pixelStride, previousFrameNr);
116
117 AndroidBitmap_unlockPixels(env, bitmap);
118 return delayMs;
119 }
120
121 static JNINativeMethod gMethods[] = {
122 { "nativeDecodeByteArray",
123 "([BII)L" JNI_PACKAGE "/FrameSequence;",
124 (void*) nativeDecodeByteArray
125 },
126 { "nativeDecodeStream",
127 "(Ljava/io/InputStream;[B)L" JNI_PACKAGE "/FrameSequence;",
128 (void*) nativeDecodeStream
129 },
130 { "nativeDestroyFrameSequence",
131 "(J)V",
132 (void*) nativeDestroyFrameSequence
133 },
134 { "nativeCreateState",
135 "(J)J",
136 (void*) nativeCreateState
137 },
138 { "nativeGetFrame",
139 "(JILandroid/graphics/Bitmap;I)J",
140 (void*) nativeGetFrame
141 },
142 { "nativeDestroyState",
143 "(J)V",
144 (void*) nativeDestroyState
145 },
146 };
147
FrameSequence_OnLoad(JNIEnv * env)148 jint FrameSequence_OnLoad(JNIEnv* env) {
149 // Get jclass with env->FindClass.
150 // Register methods with env->RegisterNatives.
151 gFrameSequenceClassInfo.clazz = env->FindClass(JNI_PACKAGE "/FrameSequence");
152 if (!gFrameSequenceClassInfo.clazz) {
153 ALOGW("Failed to find " JNI_PACKAGE "/FrameSequence");
154 return -1;
155 }
156 gFrameSequenceClassInfo.clazz = (jclass)env->NewGlobalRef(gFrameSequenceClassInfo.clazz);
157
158 gFrameSequenceClassInfo.ctor = env->GetMethodID(gFrameSequenceClassInfo.clazz, "<init>", "(JIIZII)V");
159 if (!gFrameSequenceClassInfo.ctor) {
160 ALOGW("Failed to find constructor for FrameSequence - was it stripped?");
161 return -1;
162 }
163
164 return env->RegisterNatives(gFrameSequenceClassInfo.clazz, gMethods, METHOD_COUNT(gMethods));
165 }
166